Tekritoby



(No Model.)

J. B. WALLACE.

DERRICK.

Patented May 17, 1887.

NTTE STATES PATENT FFIQEQ JOHN B. \VALLAOE, OF \VALLA \VALLA,\VASHINGTON TERRITORY.

DERRICK.

SPECIFICATION forming part of Letters Patent No. 363,101, dated May 17,1887.

. Serial No. 217,614. tNomodel.)

T 0 aZZ whom it may concern.-

Be it known that I, JOHN B. WALLACE, a citizen of the United States,residing at Walla \Valla, in the county of Walla Walla, VVashingtonTerritory, have invented a new and useful Improvement in Derricks, ofwhich the following is a specification.

My invention relates to an improvement in derricks for stacking hay andgrain; and it consists in the peculiar construction and combination ofdevices, that will be more fully set forth hereinafter, and particularlypointed out in the claims.

In the drawings, Figure 1 is a side elevation of a derrick embodying myimprovements. Fig. 2 is a top plan View of the same. Fig. 3 is atransverse sectional view taken on the line 00 m of Fig. 2. Fig. 4 is adetached view of the link M.

A represents the ground-frame, comprising the sills or runners B, thecrossbars 0, connecting the ends of the said runners, and the cross-bar1), connecting the centers thereof. One end of the said cross-bar Dprojects beyond one side of the frame. From that portion of the bar Dwhich is midway between the sills or runners projects a verticalstandard, E, which is held firmly in position by means of inclinedbraces F.

G represents a yoke that is provided with a depending shank, H, which isswiveled in a vertical opening made in the upper end of the standard, sothat the said yoke is free to turn thereon. The upper end of the yoke isbifurcated to form ears I, through which extends a transverse bolt, K.

L represents an arm which is fulcru med at a suitable distance from oneend on the bolt K, and is free to move thereon in a vertical direction.The short end of the arm is connected to the lower end of the standardby means of a flexible link, M. This link consists of the bar at, thelinks or rings m, pivoted thereto at its opposite ends, and thesecuringscrews m carried by the links or rings. The screws are insertedin the lower end of the arm L and the lower end of the standard E,respectively, and can be readily adjusted so as to adapt the derrick tothe height of the being pivoted to the bar at, allow the arm L to swingfreely and'easily, and thereby relieve the strain on t-herope U,hereinafter referred to. On the under side of the arm L, between thefulcrum K and the short end of the arm, is a guidingsheave, N.

0 represents a similar guidi rig-sheave, which is under the outer end ofthe arm L. On one side of the cross beam D, near the lower end of thestandard, is a guiding-sheave, P, and to the projecting end of the saidcrossbeam is attached a guiding-sheave, R.

8 represents an elevating-rope, which passes around the sheave P,extends under the arm L, and passes over the guiding-sheaves N and 0. Tothe depending outer end ofthe rope S is attached a fork, T, which may beof any suitable preferred construction.

U represents a rope which has one end attached to the short end of thearm L, and from thence the said rope passes around the guidingsheave Rand is attached to the elevatingrope S. The'rope U is slack when thehayfork is on the ground.

The operation of my invention is as follows: The derrick is stationednear the point where it is proposed to erect the stack, and the hay orstraw is gathered by the fork T. A horse is hitched to the outer end ofthe elevatingrope S and is caused to move outwardly from the derrick.This causes the elevating-rope S to lift the fork with its load of hayuntil the fork reaches the outer end of the arm L. By this time the ropeU is tightened, and as the horse continues to travel from the derrickthe said rope draws laterally upon the lower end of the arm L, thuscausing the latter to swing to one side, so as to suspend the forkful ofhay above the proposed stack. The horse is then backed, which causes theforkful of hay to be lowered onto the stack, as will be very readilyunderstood.

I am aware that it is not new to provide a hay-derrick with an inclinedarm which is swiveled at an intermediate point of its length upon avertical standard which is fixed to the horizontal runners, a swiveledpulley being connected to the lower end of the vertical standard, and arod .being easily connected to stack, as will be understood. The ringsm,

the short end of the inclined arm and to one of the runners, and anelevating-rope being passed through the pulley at the lower end of thestandard and through pulleys on the lower side of the inclined arm, ashort rope being connected to the short end of the inclined arm andattached to the elevatingrope at the point where the whiffletree isconnected thereto.

I am also aware that a hay-elevator has been constructed prior to myinvention which comprises a suitable base, a vertical swiveled standardconnected thereto, an inclined arm pivoted on the upper end of theswiveled standard, a horizontal arm affixed to the swiveled standardnear its lower end and having a swiveled pulley in its outer end, and apulley swiveled to the base on one side of the arm. An elevating ropepasses through suitable sheaves on the ends of the inclined arm, andthence passes through the pulley swiveled to the base on one side of theshort horizontal arm, so that when the load is elevated the rope willdraw upon the inclined arm and turn the latter and the vertical shafthorizontally to the place where it is desired to unload, the horizontalmovements of the in clined arm and vertical standard being controlled bya rope which is connected to the lower shorter end of the inclined armand passing through the pulley in the outer end of the short horizontalarm.

My invention differs from these prior devices in that I employ a sheave,P, connected to the base on one side of the vertical standard, andthrough which the elevating-rope passes before it passes through thesheaves on the inclined swiveled arm, a pulley or sheave, B, beinglikewise connected to the base on the I opposite side of the standardfrom the sheave P, and a slack rope, U, passing through the sheave R,and connected at one end to the lower end of the inclined arm and at itsother end to the elevating-rope, said rope U being slack when theelevating-cord is lowered, and being tightened when the cord is raisedto pull upon the inclined arm and swing or turn it laterally to thestack or place where it is desired to unload. I attach especialimportance to this peculiar arrangement of the pulleys and elevating andslack ropes, as I am thereby enabled to produce a derrick in which theinclined arm will be automatically turned horizontally to thedumping-point after the elevating-cord and the load have been raised.

Having thus described my invention, I claim- The herein describedderrick, comprising a suitable base, a vertical standard affixed to thebase, an inclined arm swiveled onthe standard, a sheave, P, connected tothe base on one side of the standard, an elevatingrope passing throughthe sheave P and guided in suitable sheaves on the inclined arm, a linkconnected to the lower end of the inclined arm and the standard, asheave, R, connected to the base on the opposite side of the standardfrom the sheave P, and a slack rope passed through the sheave It, andconnected at one end to the lower end of the arm and at its other end tothe elevating-rope, the slack in the rope U being taken up by theelevating-cord when the weight connected to the same has been raised,and thereby causing the rope U to draw npon'the inclined arm and swingthe same and the load laterally, all combined and arranged for operationsubstantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature ill presence of two witnesses.

. JOHN B. \VALLAOE.

\Vitnesses:

ALFRED N. MARION, ARTHUR G. MARION.

